package com.qjs.course.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import net.sf.json.JSONException;
import net.sf.json.JSONObject;

import org.apache.log4j.Logger;

import com.qjs.course.model.AccessToken;
import com.qjs.course.model.Menu;

/** 
 * 公众平台通用接口工具类 
 *  
 * @author liuyq 
 * @date 2013-08-09 
 */  
public class WeixinUtil {
	 private static Logger log =Logger.getLogger(WeixinUtil.class);
	 
	 
	// 获取access_token的接口地址（GET） 限200（次/天）  
	 public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
	  
	// 菜单创建（POST） 限100（次/天）  
	 public static String menu_create_url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN";  
	 
	    /** 
	     * 发起https请求并获取结果 
	     *  
	     * @param requestUrl 请求地址 
	     * @param requestMethod 请求方式（GET、POST） 
	     * @param outputStr 提交的数据 
	     * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值) 
	     */  
	    public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {  
	        JSONObject jsonObject = null;  
	        StringBuffer buffer = new StringBuffer();  
	        try {  
	            // 创建SSLContext对象，并使用我们指定的信任管理器初始化  
	            TrustManager[] tm = { new MyX509TrustManager() };  
	            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");  
	            sslContext.init(null, tm, new java.security.SecureRandom());  
	            // 从上述SSLContext对象中得到SSLSocketFactory对象  
	            SSLSocketFactory ssf = sslContext.getSocketFactory();  
	  
	            URL url = new URL(requestUrl);  
	            HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();  
	            httpUrlConn.setSSLSocketFactory(ssf);  
	  
	            httpUrlConn.setDoOutput(true);  
	            httpUrlConn.setDoInput(true);  
	            httpUrlConn.setUseCaches(false);  
	            // 设置请求方式（GET/POST）  
	            httpUrlConn.setRequestMethod(requestMethod);  
	  
	            if ("GET".equalsIgnoreCase(requestMethod))  
	                httpUrlConn.connect();  
	  
	            // 当有数据需要提交时  
	            if (null != outputStr) {  
	                OutputStream outputStream = httpUrlConn.getOutputStream();  
	                // 注意编码格式，防止中文乱码  
	                outputStream.write(outputStr.getBytes("UTF-8"));  
	                outputStream.close();  
	            }  
	  
	            // 将返回的输入流转换成字符串  
	            InputStream inputStream = httpUrlConn.getInputStream();  
	            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");  
	            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);  
	  
	            String str = null;  
	            while ((str = bufferedReader.readLine()) != null) {  
	                buffer.append(str);  
	            }  
	            bufferedReader.close();  
	            inputStreamReader.close();  
	            // 释放资源  
	            inputStream.close();  
	            inputStream = null;  
	            httpUrlConn.disconnect();  
	            jsonObject = JSONObject.fromObject(buffer.toString());  
	        } catch (ConnectException ce) {  
	            log.error("Weixin server connection timed out.");  
	        } catch (Exception e) {  
	            log.error("https request error:{}", e);  
	        }  
	        return jsonObject;  
	    }  
	    
	    
	    /** 
	     * 获取access_token 
	     *  
	     * @param appid 凭证 
	     * @param appsecret 密钥 
	     * @return 
	     */  
	    public static AccessToken getAccessToken(String appid, String appsecret) {  
	        AccessToken accessToken = null;  
	      
	        String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);  
	        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);  
	        // 如果请求成功  
	        if (null != jsonObject) {  
	            try {  
	                accessToken = new AccessToken();  
	                accessToken.setToken(jsonObject.getString("access_token"));  
	                accessToken.setExpiresIn(jsonObject.getInt("expires_in"));  
	            } catch (JSONException e) {  
	                accessToken = null;  
	                // 获取token失败  
	                log.error("获取token失败 errcode:{} errmsg:{}"+ jsonObject.getString("errcode")+jsonObject.getString("errmsg"));  
	            }  
	        }  
	        return accessToken;  
	    }  
	    
	    
	    /** 
	     * 创建菜单 
	     *  
	     * @param menu 菜单实例 
	     * @param accessToken 有效的access_token 
	     * @return 0表示成功，其他值表示失败 
	     */  
	    public static int createMenu(Menu menu, String accessToken) {  
	        int result = 0;  
	      
	        // 拼装创建菜单的url  
	        String url = menu_create_url.replace("ACCESS_TOKEN", accessToken);  
	        // 将菜单对象转换成json字符串  
	        String jsonMenu = JSONObject.fromObject(menu).toString();  
	        // 调用接口创建菜单  
	        JSONObject jsonObject = httpRequest(url, "POST", jsonMenu);  
	      
	        if (null != jsonObject) {  
	            if (0 != jsonObject.getInt("errcode")) {  
	                result = jsonObject.getInt("errcode");  
	                log.error("创建菜单失败 errcode:{} errmsg:{}"+jsonObject.getString("errcode")+ jsonObject.getString("errmsg"));  
	            }  
	        }  
	      
	        return result;  
	    }  
	    
}
